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The Ultimate Guide to React Native Optimization 2025
This Guide Is Divided Into 3 Parts
Part 1: JavaScript Optimization
- How to Profile JS and React Code
- How to Measure JS FPS
- How to Hunt JS Memory Leaks
- Uncontrolled Components
- Higher-Order Specialized Components
- Atomic State Management
- Concurrent React
- React Compiler
- High-Performance Animations Without Dropping Frames
Part 2: Native Optimization
- Understand Platform Differences
- How to Profile Native Parts of React Native
- How to Measure TTI
- Understanding Native Memory Management
- Understand the Threading Model of Turbo Modules and Fabric
- Use View Flattening
- Use dedicated React Native SDKs Over Web
- Make Your Native Modules Faster
- How to Hunt Memory Leaks
Part 3: Bundling Optimization
- How to Analyze JS Bundle Size
- How to Analyze App Bundle Size
- Determine True Size of Third-Party Libraries
- Avoid Barrel Exports
- Experiment With Tree Shaking
- Load Code Remotely When Needed
- Shrink Code With R8 Android
- Use Native Assets Folder
- Disable JS Bundle Compression
This is a fascinating read, even if you aren’t deep into React Native. Callstack’s direct work output reduced app launch times by 70%, which users can/will “feel” in the final product. They were fantastic partners in delivering leaps forward for a 100+ million user platform.
Callstack did a great job with this guide. It’s very good! I have it as required reading for any React Native developer.
Absolutely a must read for any React Native developer out there.
This has been one of my favorite comprehensive resources when focused on React Native performance. Also, it's FREE!
What’s New in The 2025 Edition
What’s New in The 2025 Edition
Master React Native Performance Optimization
React Native is evolving, and so are its performance challenges. The Ultimate Guide to React Native Optimization gives you the latest and most effective battle-tested strategies to make your app faster, more efficient, and more scalable.
Who is this guide for?
Whether you're just beginning your adventure with React Native or you're a seasoned engineer, we're sure you'll find something to learn and adopt in your apps.
Why React Native Performance Optimization Matters
Performance is more than just a technical concern—it’s a user experience priority. A sluggish UI and long load times frustrate users and drive them away.
Fast apps win and slow apps get abandoned
Two key metrics define the React Native app’s performance:
- Time to Interactive (TTI): How quickly your app becomes usable after launch. A high TTI means users are stuck waiting.
- Frames Per Second (FPS): How smoothly your UI renders and responds. If FPS drops, animations stutter, making your app feel slow.
Ignoring performance optimization means losing users, getting poor reviews, and watching engagement drop. But the good news? You can fix it.
Callstack: Your React Native Performance Advisors
Callstack is a leading force in React Native development. As core contributors and Meta partners, we actively shape the framework, maintain key modules, and help teams solve complex performance challenges. Our expertise ensures you stay ahead with cutting-edge performance strategies and best practices.
- React Native Core Contributors We help shape the framework’s evolution.
- Meta Partners Direct access to the latest advancements.
- Performance-focused solutions We optimize mission-critical apps.
- Trusted by top engineering teams From startups to global enterprises.
- Maintainers of key open-source projects Pushing the React Native ecosystem forward.
Join 10k+ Developers Improving React Native Performance
What’s New in The 2025 Edition
